Funding for this research was provided by:
Research Foundation of Guangzhou Women and Children's Medical Center for Clinical Doctor
Received: 22 March 2022
Accepted: 28 June 2022
First Online: 18 July 2022
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. The requirement for informed consent was waived because of the retrospective nature of the study and the study protocol was approved by the ethics committees of Guangzhou Women and Children’s Medical Center (No: 2022013A01).
: Not applicable.
: The authors declare that they have no competing interests.